NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

4 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.

Most active assignees, last 30 days — NPA 510
ONVOY, LLC - CA 3
BANDWIDTH.COM CLEC, LLC - CA 1
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2003-10-23 510-860-1XXX 1000–1999Assigned METROPCS, INC. 5562 RICHMOND CA
2003-10-23 510-860-2XXX 2000–2999Assigned METROPCS, INC. 5562 RICHMOND CA
2003-10-23 510-860-3XXX 3000–3999Assigned METROPCS, INC. 5562 RICHMOND CA
2003-10-23 510-860-5XXX 5000–5999Assigned METROPCS, INC. 5562 RICHMOND CA
2003-10-23 510-860-6XXX 6000–6999Assigned METROPCS, INC. 5562 RICHMOND CA
2003-10-23 510-860-7XXX 7000–7999Assigned METROPCS, INC. 5562 RICHMOND CA
2003-10-23 510-860-8XXX 8000–8999Assigned METROPCS, INC. 5562 RICHMOND CA
2003-10-23 510-860-9XXX 9000–9999Assigned METROPCS, INC. 5562 RICHMOND CA
2003-10-20 510-565-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 FRNK MAIN CA
2003-10-20 510-565-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 FRNK MAIN CA
2003-10-16 510-552-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRNK MAIN CA
2003-10-16 510-557-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRNK MAIN CA
2003-10-16 510-557-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRNK MAIN CA
2003-10-16 510-557-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRNK MAIN CA
2003-10-10 510-258-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HAYWARD CA
2003-10-10 510-449-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK MAIN CA
2003-10-09 510-292-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OKLD BKLY CA
2003-10-09 510-292-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OKLD BKLY CA
2003-10-09 510-292-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OKLD BKLY CA
2003-10-09 510-292-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OKLD BKLY CA
2003-09-26 510-461-5XXX 5000–5999Assigned METROPCS, INC. 5562 HAYWARD CA
2003-09-19 510-214-8XXX 8000–8999Assigned IP HORIZON LLC 515J OKLD ALMD CA
2003-09-19 510-229-4XXX 4000–4999Assigned IP HORIZON LLC 515J OKLD BKLY CA
2003-09-19 510-240-7XXX 7000–7999Assigned IP HORIZON LLC 515J FRNK GRNLF CA
2003-09-19 510-257-2XXX 2000–2999Assigned IP HORIZON LLC 515J FRNK OLIVR CA
2003-09-19 510-257-3XXX 3000–3999Assigned IP HORIZON LLC 515J FRNK OLIVR CA
2003-09-19 510-269-8XXX 8000–8999Assigned IP HORIZON LLC 515J OKLD FRTVL CA
2003-09-19 510-296-1XXX 1000–1999Assigned IP HORIZON LLC 515J HRCUL-RODE CA
2003-09-19 510-296-2XXX 2000–2999Assigned IP HORIZON LLC 515J HRCUL-RODE CA
2003-09-19 510-686-4XXX 4000–4999Assigned IP HORIZON LLC 515J OKLD TRNID CA
2003-09-17 510-964-5XXX 5000–5999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J ELSBR-PINL CA
2003-09-12 510-449-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK MAIN CA
2003-09-12 510-449-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK MAIN CA
2003-09-12 510-552-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRNK MAIN CA
2003-09-12 510-552-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRNK MAIN CA
2003-09-11 510-566-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HAYWARD CA
2003-09-11 510-566-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HAYWARD CA
2003-09-11 510-566-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HAYWARD CA
2003-09-11 510-566-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HAYWARD CA
2003-09-03 510-493-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK MAIN CA
2003-09-02 510-861-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HAYWARD CA
2003-08-05 510-402-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 FRNK MAIN CA
2003-07-16 510-260-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RICHMOND CA
2003-07-16 510-260-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RICHMOND CA
2003-07-16 510-260-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RICHMOND CA
2003-07-16 510-260-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RICHMOND CA
2003-07-15 510-295-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OKLD BKLY CA
2003-07-15 510-295-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OKLD BKLY CA
2003-07-15 510-461-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HAYWARD CA
2003-07-15 510-996-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FRNK MAIN CA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.